CVE-2025-21800 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net/mlx5: HWS fix definer’s HWS_SET32 macro for negative offset

When bit offset for HWS_SET32 macro is negative UBSAN complains about the shift-out-of-bounds:

UBSAN: shift-out-of-bounds in drivers/net/ethernet/mellanox/mlx5/core/steering/hws/definer.c:177:2 shift exponent -8 is negative

Reference

https://git.kernel.org/stable/c/69c676c0ded472713e6d1b3a456b3c4f52f66f0e https://git.kernel.org/stable/c/92cff996624c4757d5bbace3dfa3f1567ba94143 https://git.kernel.org/stable/c/be482f1d10da781db9445d2753c1e3f1fd82babf